Title:
OPENING DEVICE AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2017102203
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an opening device having a more shortened driving time for changing an opening, and an imaging apparatus.SOLUTION: An opening device 100 of the present invention comprises: a first circular plate member 10 whose center is open; a second circular plate member 20 whose center is open and that rotates relative to the first circular plate member 10; a plurality of blades 30 that regulate an opening diameter by overlapping with each other and can change the size of the opening diameter by being driven by the rotation of the second circular plate member 20; and a plurality of position detection parts 23A, 23B, 60A for detecting positions of the second circular plate member 20 relative to the first circular plate member 10.SELECTED DRAWING: Figure 5
Inventors:
KOTAKI YOICHI
Application Number:
JP2015233777A
Publication Date:
June 08, 2017
Filing Date:
November 30, 2015
Export Citation:
Assignee:
NIKON CORP
International Classes:
G03B9/02
Attorney, Agent or Firm:
Masao Sekiguchi
Takamasa Nakano
Takamasa Nakano
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